Advantage -vs- Disadvantage: SFTP -vs- SCP

[Ed Flecko]

Hi folks,
I have a server I'm building that is internet accessible and I'm
wondering if there's any advantages/disadvantages of using either SFTP
-vs- SCP?

My primary concern is overall security of the server (even if that
means inconveniencing the end users), and I'm wondering if one method
might be better than the other?

Comments???

Thank you,
Ed